/********************************************************************************
 *      Copyright:  (C) 2020 YangZhengQing<2489833081@qq.com>
 *                  All rights reserved.
 *
 *       Filename:  data_transmission.h
 *    Description:  This head file 
 *
 *        Version:  1.0.0(04/08/2020)
 *         Author:  YangZhengQing <2489833081@qq.com>
 *      ChangeLog:  1, Release initial version on "04/08/2020 04:45:59 PM"
 *                 
 ********************************************************************************/

#ifndef _DATA_TRANSMISSION_H_
#define _DATA_TRANSMISSION_H_

char* receive_data(int fd);
int send_data(int fd,char *buff);
ssize_t readn(int fd, void *vptr, size_t n);

#endif
